Are Labour right about the Liz Truss effect on mortgages? Are the Conservatives right about pensioners? Are Plaid Cymru right about spending? Are the Lib Dems right about care funding? Is Count Binface right about croissants?

Why are MRP polls coming up with such different numbers?

Do erections require a litre of blood?

Tim Harford investigates the numbers in the news.

Presenter: Tim HarfordReporter: Kate LambleProducers: Simon Tulett, Nathan Gower, Beth Ashmead Latham and Debbie RichfordSeries producer: Tom CollsProduction coordinator: Brenda BrownSound mix: Rod FarquharEditor: Richard Vadon